Philips docking speaker with Bluetooth® DS3500/37, 2.0 channels, 10 W, USB, iPad, iPhone, iPod, Classic, Flat, Jazz, Pop, Rock, Neodymium Philips docking speaker with Bluetooth® DS3500/37. Audio output channels: 2.0 channels, RMS rated power: 10 W. Headphone connectivity: USB. Apple docking compatibility: iPad, iPhone, iPod, Equalizer modes: Classic, Flat, Jazz, Pop, Rock. Magnet type: Neodymium, Volume control: Digital. Power source type: AC, Battery, Battery technology: Alkaline, Battery type: AA